Update pip and setuptools in requirements txt

Versions selected to be pre-19 pip
due to unresolved issues with the build systems

Upgrade everything, party on

document new process

rotate license files

fix Swagger schema generation target

Remove --ignore-installed flag

awx/__init__.py

@@ -24,31 +24,18 @@ except ImportError: # pragma: no cover
 import hashlib
 
 try:
-    import django
-    from django.db.backends.base import schema
-    from django.db.backends.utils import names_digest
+    import django  # noqa: F401
     HAS_DJANGO = True
 except ImportError:
     HAS_DJANGO = False
+else:
+    from django.db.backends.base import schema
+    from django.db.backends.utils import names_digest
 
 
 if HAS_DJANGO is True:
-    # This line exists to make sure we don't regress on FIPS support if we
-    # upgrade Django; if you're upgrading Django and see this error,
-    # update the version check below, and confirm that FIPS still works.
-    # If operating in a FIPS environment, `hashlib.md5()` will raise a `ValueError`,
-    # but will support the `usedforsecurity` keyword on RHEL and Centos systems.
-
-    # Keep an eye on https://code.djangoproject.com/ticket/28401
-    target_version = '2.2.4'
-    if django.__version__ != target_version:
-        raise RuntimeError(
-            "Django version other than {target} detected: {current}. "
-            "Overriding `names_digest` is known to work for Django {target} "
-            "and may not work in other Django versions.".format(target=target_version,
-                                                                current=django.__version__)
-        )
 
+    # See upgrade blocker note in requirements/README.md
     try:
         names_digest('foo', 'bar', 'baz', length=8)
     except ValueError: